CVE-2026-80779 PUBLISHED

net/ionic: avoid OOB TX partner lookup for hwstamp RXQ

Assigner: Linux
Reserved: 26.08.2026 Published: 04.09.2026 Updated: 04.09.2026

In the Linux kernel, the following vulnerability has been resolved:

net/ionic: avoid OOB TX partner lookup for hwstamp RXQ

The dedicated hardware timestamp RX queue is allocated with q->index equal to lif->ionic->nrxqs_per_lif. The normal txqcqs array only contains the regular queue pairs, so using that index to set rxq->partner can read one entry past txqcqs[] and then write through the derived pointer. Only link RX/TX partners for normal queue-pair indexes. Leave the hwstamp RX queue unpaired, and make the XDP_TX path abort cleanly if an RX queue has no TX partner.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 8eeed8373e1cca836799bf8e4a05cffa8e444908 to 881a805a8029ba48c0ce81c6674910f8d83f7afb (excl.)
  • affected from 8eeed8373e1cca836799bf8e4a05cffa8e444908 to 39fc615e355b65b8d43be30da57aa95ae6eaf688 (excl.)
  • affected from 8eeed8373e1cca836799bf8e4a05cffa8e444908 to f3868046e8e2e761d4d943a232bd109ff22a7d5b (excl.)
  • affected from 8eeed8373e1cca836799bf8e4a05cffa8e444908 to ea081b4435515ac7177eb598a3c0678d1b9e7911 (excl.)
  • affected from 8eeed8373e1cca836799bf8e4a05cffa8e444908 to d92255b405fb6f5acca408239ccd742e0a42c9cb (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.9 is affected
  • unaffected from 0 to 6.9 (excl.)
  • unaffected from 6.12.106 to 6.12.* (incl.)
  • unaffected from 6.18.47 to 6.18.* (incl.)
  • unaffected from 7.1.11 to 7.1.* (incl.)
  • unaffected from 7.2.1 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References